JP2864268B2 - Composite separator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a composite separator that can be used as a steam separator for improving the dryness of steam generated from a boiler, for example.

[Conventional technology]

The cyclone separator introduces a multi-phase fluid from a tangential direction into a substantially cylindrical separation cylinder, and swirls it inside to separate droplets and solid particles to obtain a gas-phase fluid. is there.

An example of use will be described for a boiler with reference to FIG. 3 and FIG.

In the drawings, (1) is a separation tube, (2) is an inlet tube tangentially connected to one side of the separation tube (1), and (3) is a steam outlet tube attached to the center of the upper end of the separation tube (1). , (4) show a droplet outlet tube attached to the center of the lower end of the separation tube (1).

In the illustrated cyclone type separator, steam generated from the boiler is introduced tangentially from the introduction pipe (2) into the separation tube (1), and swirled in the separation tube (1) to form droplets (saturated water). Is centrifuged to improve the dryness of the steam. At this time, the droplet separated in the separation tube (1) travels along the inner wall of the separation tube (1) and drains from the lower droplet outlet pipe (4). Is supplied to the boiler, thereby increasing the temperature of the supply water in the boiler and improving the thermal efficiency.

[Problems to be solved by the invention]

In this type of separator, a gas-liquid multi-phase flow such as a vapor and a droplet (saturated water) as described above is said to have lower separation performance than a solid-liquid multi-phase flow. When the gas-liquid multiphase flow flows from the introduction pipe (2) into the separation cylinder (1), a considerable amount of the droplet flows along the pipe wall of the introduction pipe (2), and a part of the vapor (saturated steam) flows. : Gaseous component). That is, since the velocity of the droplet flowing along the tube wall is significantly lower than the velocity of the vapor flow, even if the liquid flows into the separation tube (1), the separation effect by the centrifugal force is small, and the separation tube (1) Spattering from the inner wall or traversing the inside of the pipe, etc., and re-enters the highly dry (droplet separated) steam from the inside of the separation tube (1) to the steam outlet pipe (3). become.

For this reason, high dryness steam cannot be obtained only by using the conventional separator in a normal mode.

[Means for solving the problem]

The present invention has been made in view of the above-described problems, and has a separator element having an auxiliary introduction pipe and a separation wall that has the same function as a single-structured separator composed of an introduction pipe and a separation tube. The main point is a composite type separator with a built-in.

[Action]

According to the present invention, the liquid drop flowing mainly along the wall surface is caused to flow into the gap between the separation cylinder and the separation wall from the gap between the introduction pipe and the auxiliary introduction pipe, so that the liquid drop quantity is early. Separated by the multi-phase main flow with relatively few droplets,
Thereafter, the main flow of the multiphase flow is further subjected to gas-liquid separation, whereby the separation performance can be greatly improved.

〔Example〕

FIGS. 1 and 2 show an embodiment of a composite separator according to the present invention. Members corresponding to those in FIGS. 3 and 4 are denoted by the same reference numerals and are described in detail. Omitted.

In the composite separator, as shown in the drawings, an auxiliary introduction pipe (11) is installed substantially coaxially inside the introduction pipe (2), and a separation tube ( A separating wall (12) extending along the inner wall of (1) is attached, and a desired gap (g) is formed between the inner wall of the separating cylinder (1) and the separating wall (12).

In this example, the auxiliary introduction pipe (11) is constituted by a short pipe, and the inside of the introduction pipe (2) is separated from the introduction pipe (2) by a predetermined gap. It is arranged at a position near both connecting portions of the tube (1).

The separation wall (12) is formed with a predetermined length (for example, several times the diameter of the introduction pipe) vertically above and below the axis of the separation cylinder (1) from the connection with the auxiliary introduction pipe (11). The circumferential length of the separation wall itself is set such that the end (12a) on the side of the swirling direction (counterclockwise direction in FIG. 2) of the multiphase fluid flowing into the separation cylinder (1) is in the counter-swirl direction (clockwise direction in FIG. 2). It is set to be longer than the end (12b) on the (direction) side. Separation wall in this case (12)
The end (12b) on the side opposite to the swiveling direction of the pipe is sufficiently covered with the opening of the introduction pipe (2) in the separation cylinder (1), from which the introduction pipe (1) and the auxiliary introduction pipe (11) are connected. Of the multi-phase fluid flowing through the gap between the inner wall and the inner wall of the separation wall (12).

In the above configuration, when a gas-liquid multi-phase flow such as steam generated from a boiler flows into the introduction pipe (1), most of the droplets flow along the inner wall of the introduction pipe (1) as described above. ,
A part flows as moist steam as a whole while floating in steam (saturated steam: gas portion). Of these, the one that flows along the pipe wall flows into the gap between the introduction pipe (2) and the auxiliary introduction pipe (11), and then flows between the separation tube (1) and the separation wall (12). Flows downward while rotating counterclockwise in the above gap (g), and flows out from the lower outlet pipe (4).

On the other hand, the steam (wet steam) containing the remaining droplets flows directly from the inlet pipe (2) into the auxiliary inlet pipe (12), and first swirls along the inner peripheral surface of the separation wall (12). Gas-liquid separation. After the above-mentioned steam has passed through the separation wall end portion (12a), it flows while turning along the inner peripheral wall of the separation tube (1),
The remaining liquid droplets are separated by the centrifugal force generated by the swirling flow, and the steam whose degree of drying is further increased flows into the upper outlet pipe (3). (1) It flows along the inner wall surface and flows into the outlet pipe (4).

Therefore, according to the composite separator according to the present invention,
Even if the vapor is extremely dry (or a gas-liquid mixed-phase fluid with a large amount of liquid phase), the droplets (liquid phase) flowing along the wall surface are separated at an early stage, and then relatively dry. Since the steam main stream is further separated, steam with a constant high dryness can be obtained.

In the above embodiment, the circumferential length of the separation wall (12) is set to approximately 1/4 of the circumference of the separation tube (1).
At least one of the end portions (12a) and (12b) may be further extended, and may be extended until both end portions (12a) and (12b) are joined to each other to form a cylindrical shape. Furthermore, separation wall (12)
The length in the axial direction is substantially equal to the length in the vertical direction with respect to the auxiliary introduction pipe (11), but is not limited to this. In order to further improve the gas-liquid separation performance, You can set it longer.

The separator of the present invention has been described by taking as an example a steam-water separator for improving the dryness of steam generated from a boiler or the like.However, in other chemical industry fields, a gas-phase flow and a liquid-phase flow are used. If it is a separator used for separation,
All are applicable.

〔The invention's effect〕

As described above, the present invention provides a liquid-phase multiphase flow that mainly transmits a liquid phase flowing along a wall from a gap between an introduction pipe and an auxiliary introduction pipe to a gap between a separation cylinder and a separation wall. By introducing, the above liquid phase component is separated from the main phase of the multiphase flow having a relatively small liquid phase at an early stage, and then the main phase of the multiphase flow is further subjected to gas-liquid separation. Gas-liquid separation can be performed stably and efficiently even in a gas-liquid multiphase flow with a large amount, and the separation performance is extremely high.

Moreover, according to the composite separator of the present invention, despite having the extremely high performance as described above, only a small separator element including the auxiliary introduction pipe and the separation wall is provided in the conventionally-shaped separator, Great industrial effects can be obtained, such as easy production and low cost.

[Brief description of the drawings]

1 and 2 show an embodiment of the composite separator according to the present invention. FIG. 1 is a side view, and FIG. 2 is a cross-sectional view of a main part. 3 and 4 show an example of a conventional cyclone separator. FIG. 3 is a side view, and FIG. 4 is a cross-sectional view of a main part. (1) Separation tube (2) Inlet tube (11) Auxiliary inlet tube (12) Separation wall (g) Gap

Claims (1)

(57) [Claims] 1. A cyclone separator in which an introduction pipe (2) is connected tangentially to a separation tube (1), wherein an auxiliary introduction pipe (11) is installed substantially coaxially inside the introduction pipe (2). A separation mold (12) extending along the inner wall of the separation tube (11) is attached to the inner end of the auxiliary introduction pipe (11), and the separation wall (11) is separated from the inner wall of the separation tube (1). Wall (1
2) a composite separator in which a desired gap is formed between the separator and the composite separator.